.page-about {
  --about-w: 72ch;
  background: var(--field);
  color: var(--ink);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 4.5vw, 52px) clamp(34px, 6vw, 76px);
  background:
    radial-gradient(120% 95% at 100% 0%, rgba(67, 245, 207, 0.14), transparent 58%),
    linear-gradient(158deg, var(--night), var(--field) 74%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.4;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 88%);
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-crumb {
  margin-bottom: 20px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

.page-about .about-crumb li {
  color: var(--ink-mute);
}

.page-about .about-crumb a {
  color: var(--ink-soft);
  text-decoration: none;
}

.page-about .about-crumb a:hover {
  color: var(--cyan);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 66px);
  line-height: 1.03;
  letter-spacing: -0.01em;
  margin: 12px 0 18px;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .about-hero__text {
  max-width: 54ch;
  color: var(--ink-soft);
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-hero__stat b {
  display: block;
  font-size: 24px;
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -0.02em;
  font-weight: 700;
}

.page-about .about-hero__stat span {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink-mute);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: 0 34px 80px -46px rgba(0, 0, 0, 0.9);
  aspect-ratio: 4 / 3;
  background: var(--moss);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 26, 20, 0.86), transparent 58%);
  pointer-events: none;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 18px;
  bottom: 14px;
  z-index: 1;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  opacity: 0.9;
}

/* ---------- 档案主体 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(32px, 5.5vw, 68px);
}

.page-about .about-index {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(30, 74, 58, 0.26);
  padding: 16px 16px 18px;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--stone);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-s);
  border-left: 2px solid transparent;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index__no {
  font-size: 11px;
  color: var(--stone);
  flex: none;
}

.page-about .about-index__link:hover {
  color: var(--cream);
  background: rgba(67, 245, 207, 0.08);
}

.page-about .about-index__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(67, 245, 207, 0.1);
}

.page-about .about-index__link[aria-current="true"] .about-index__no {
  color: var(--cyan);
}

.page-about .about-index__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-mute);
}

.page-about .about-index__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  scroll-margin-top: calc(var(--header-h) + 20px);
  padding-bottom: clamp(32px, 4.5vw, 56px);
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid var(--line);
  padding-top: clamp(32px, 4.5vw, 56px);
}

.page-about .about-sec__tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--clay);
}

.page-about .about-sec h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.005em;
  margin: 0 0 16px;
  color: var(--cream);
}

.page-about .about-sec p {
  max-width: var(--about-w);
  margin: 0 0 15px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-sec p:last-child {
  margin-bottom: 0;
}

.page-about .about-sec h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--cream);
}

.page-about .about-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-top: 22px;
  padding: 16px 18px;
  border-left: 2px solid var(--clay);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  background: rgba(198, 106, 74, 0.08);
}

.page-about .about-note__k {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--clay);
  padding-top: 3px;
}

.page-about .about-note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 方法四格 ---------- */
.page-about .about-method {
  position: relative;
  margin-top: 26px;
  padding: clamp(18px, 3vw, 32px);
  border-radius: var(--radius-l);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  background: linear-gradient(155deg, var(--moss), var(--night) 72%);
}

.page-about .about-method__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
}

.page-about .about-method__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  filter: saturate(0.6);
}

.page-about .about-method__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 26, 20, 0.55), rgba(7, 26, 20, 0.93));
}

.page-about .about-method__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-step {
  padding: 16px 18px 18px;
  border-radius: var(--radius-m);
  border: 1px solid rgba(201, 216, 210, 0.2);
  background: rgba(7, 26, 20, 0.58);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-step:hover {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
}

.page-about .about-step__no {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 里程碑 ---------- */
.page-about .about-miles {
  position: relative;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-miles::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom, var(--cyan), rgba(67, 245, 207, 0.12));
}

.page-about .about-mile {
  position: relative;
  padding: 0 0 26px 32px;
}

.page-about .about-mile::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--field);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(67, 245, 207, 0.1);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-mile:hover::before {
  background: var(--cyan);
  box-shadow: 0 0 0 7px rgba(67, 245, 207, 0.16);
}

.page-about .about-mile__year {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-about .about-mile p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 62ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .about-roster {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-roster li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 13px 16px;
  background: var(--night);
  font-size: 14px;
  color: var(--ink-soft);
}

.page-about .about-roster b {
  color: var(--cyan);
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  aspect-ratio: 3 / 4;
  background: var(--moss);
  position: relative;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  opacity: 0.85;
}

/* ---------- 内容标准 ---------- */
.page-about .about-standards {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-standards li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(30, 74, 58, 0.42), rgba(14, 42, 33, 0.2));
}

.page-about .about-standards__no {
  font-size: 13px;
  color: var(--teal);
  padding-top: 4px;
}

.page-about .about-standards p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 荣誉与联系 ---------- */
.page-about .about-contact {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-contact__block {
  padding: 18px;
  background: var(--night);
}

.page-about .about-contact__k {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stone);
}

.page-about .about-contact__v {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--cyan);
  word-break: break-word;
}

.page-about .about-contact__v--sm {
  font-size: 15px;
  color: var(--cream);
  font-family: var(--font-body);
  font-weight: 600;
}

.page-about .about-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-l);
  border: 1px solid var(--line-cyan);
  background:
    radial-gradient(90% 120% at 0% 0%, rgba(67, 245, 207, 0.12), transparent 62%),
    var(--night);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-about .about-totop {
  margin: 20px 0 0;
  font-size: 13px;
}

.page-about .about-totop a {
  color: var(--ink-mute);
  text-decoration: none;
  border-bottom: 1px dashed var(--line-strong);
}

.page-about .about-totop a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-method__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-hero__figure {
    aspect-ratio: 3 / 4;
    max-height: 520px;
  }

  .page-about .about-hero::after {
    content: "";
    position: absolute;
    right: -12%;
    top: -18%;
    width: 46%;
    height: 130%;
    background: linear-gradient(135deg, rgba(14, 127, 116, 0.28), transparent 72%);
    transform: skewX(-12deg);
    pointer-events: none;
  }

  .page-about .about-body {
    grid-template-columns: minmax(180px, 226px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: start;
  }

  .page-about .about-team__figure {
    margin-top: 4px;
  }

  .page-about .about-standards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-contact {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-about .about-index {
    padding: 20px 20px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-step,
  .page-about .about-mile::before,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .about-step:hover {
    transform: none;
  }
}
<<<END>>>